NETGEAR Nighthawk DOCSIS 3.1 Mid/High-Split Modem (CM3000-1AZNAS) – Approved for Today's Fastest Speeds - Works with All Providers, Incl. Xfinity, Spectrum, Cox - Plans up to 2.5Gbps

This mid/high-split DOCSIS 3.1 cable modem unlocks faster download and upload speeds for gaming, video conferencing, and large file uploads.

Connectivity TechnologyEthernet

About this item

  • Maximize Your Cable Home Internet: This mid/high-split DOCSIS 3.1 cable modem unlocks faster download and upload speeds for gaming, video conferencing, and large file uploads. Pair with any WiFi router or mesh system for wireless connectivity throughout your home.
  • Approved For Your Provider And Plan: Works with Xfinity, Spectrum, Cox, and most US cable providers on plans up to 2 Gbps. Confirm mid-split availability with your provider. Not compatible with fiber or bundled voice.
  • Multi-Gig Speeds For Your Connected Home: Brings the bandwidth your router needs to keep phones, laptops, smart TVs, cameras, and smart home devices running smoothly. Real-world speeds depend on your cable plan, ISP network, and paired router.
  • Future-Proof Your Home Network: The 2.5 Gig Ethernet port connects your router for the fastest speeds in your area. Combine the two 1 Gig ports on a compatible router for speeds up to 2 Gbps. Ready for today's multi-gig plans and tomorrow's speed upgrades.
Category: NetworkingModemsRanked #99 of 160 in Networking
8.4Our score
Our verdict

This mid/high-split DOCSIS 3.1 cable modem unlocks faster download and upload speeds for gaming, video conferencing, and large file uploads.

Ranked #99 in Networking · 4 things we like

Quick answer The NETGEAR Nighthawk DOCSIS 3.1 Mid/High-Split scores 8.4/10 with us. Amazon owners rate it 4.2 out of 5 across 3,025 reviews, in line with the 4.3 average of the 145 products we track in Networking. It was listed at $269.99 on Amazon when we last checked in September 2026.

When your current modem can't keep up with a modern connected home, upload speeds crawl during video calls, cloud backups drag on for hours, and streams stutter when the whole family is online at once. Upgrading to a dedicated mid/high-split modem is the answer. The NETGEAR Nighthawk CM3000 delivers up to 2.5 Gbps download and 1 Gbps upload speeds, built for households ready to move up to the fastest cable internet plans available today.

This is a standalone cable modem with no built-in WiFi. Pair with any WiFi router or mesh system for wireless connectivity throughout your home. Works with Xfinity, Spectrum, Cox, and most US cable providers on plans up to 2 Gbps.

Not compatible with fiber, DSL, satellite, or bundled voice services. Confirm mid-split availability with your provider before purchasing. Set up using the free NETGEAR Nighthawk app on iOS or Android, or any web browser.

Plus

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Product information

20 specifications
BrandNETGEAR
Internet Service ProviderXfinity, Spectrum, Cox
Modem TypeCable
Number of Packs1
Unit Count1 Count
Number of Items1
Built-In MediaNighthawk® DOCSIS® 3.1 High Speed Internet Cable Modem (CM3000), One (1) Ethernet cable, Power adapter, Quick start guid
Item Weight2.5 pounds
Model NumberCM3000-1AZNAS
Mfr Part NumberCM3000-1AZNAS
Warranty Description1 Year Limited
Connectivity TechnologyEthernet
Compatible DevicesPersonal Computer, Router, Laptop
Number of Ports3
Maximum Downstream Data Transfer Rate2500 megabits_per_second
Maximum Upstream Data Transfer Rate1000 megabits_per_second
Data Transfer Rate2500 megabits_per_second
Number of Ethernet Ports3
Item Dimensions L x W x H9.21"L x 8.74"W x 4.8"H
ColorBlack

Pros & cons

What we like
  • MAXIMIZE YOUR CABLE HOME INTERNET: This mid/high-split DOCSIS 3.1 cable modem unlocks faster download and upload speeds for gaming, video conferencing, and large file uploads. Pair with any WiFi router or mesh system for wireless connectivity throughout your home.
  • APPROVED FOR YOUR PROVIDER AND PLAN: Works with Xfinity, Spectrum, Cox, and most US cable providers on plans up to 2 Gbps. Confirm mid-split availability with your provider. Not compatible with fiber or bundled voice.
  • MULTI-GIG SPEEDS FOR YOUR CONNECTED HOME: Brings the bandwidth your router needs to keep phones, laptops, smart TVs, cameras, and smart home devices running smoothly. Real-world speeds depend on your cable plan, ISP network, and paired router.
  • FUTURE-PROOF YOUR HOME NETWORK: The 2.5 Gig Ethernet port connects your router for the fastest speeds in your area. Combine the two 1 Gig ports on a compatible router for speeds up to 2 Gbps. Ready for today's multi-gig plans and tomorrow's speed upgrades.
What could be better

    NETGEAR Nighthawk DOCSIS 3.1 Mid/High-Split: questions & answers

    Is the NETGEAR Nighthawk DOCSIS 3.1 Mid/High-Split worth buying?

    Yes, for most buyers it is a safe choice. We score the NETGEAR Nighthawk DOCSIS 3.1 Mid/High-Split 8.4 out of 10. Amazon owners rate it 4.2 out of 5 across 3,025 reviews, in line with the 4.3 average of the 145 products we track in Networking.

    How much does the NETGEAR Nighthawk DOCSIS 3.1 Mid/High-Split cost?

    It was listed at $269.99 on Amazon when we last checked in September 2026. Amazon prices change daily, so use the price button on this page to see the current figure.

    What options does the NETGEAR Nighthawk DOCSIS 3.1 Mid/High-Split come in?

    Amazon lists 2 options. Style: (NEW) 2.5Gbps, (Discontinued) 2.5Gbps. Pick an option on this page and the button opens exactly that model.

    What are good alternatives to the NETGEAR Nighthawk DOCSIS 3.1 Mid/High-Split?

    Similar, well-rated products in our catalog: NETGEAR Nighthawk Modem Router Combo (8.2/10, 4.2 stars from 5,901 owners); NETGEAR Orbi Cable Modem Router Combo Mesh (8.0/10, 4.0 stars from 1,412 owners); ARRIS (8.6/10, 4.3 stars from 15,571 owners).

    Customer reviews

    All reviews on Amazon
    4.23,025 global ratings
    5 star67%
    4 star11%
    3 star0%
    2 star0%
    1 star22%

    Breakdown from the 9 most helpful reviews we imported.

    M
    Mr. E One
    Verified purchaseJuly 1, 2024
    Perfect Match with the Nighthawk BE19000

    This Netgear Nighthawk CM2000 cable internet modem is pure awesome. I quickly noticed a increase in both my speed and performance while using this unit. It's so very many light years above the Arris Surfboard S33 that I last had that it will never be funny again. The best perfect match for this unit that I have come across as you all see in photo is the Nighthawk BE19000 router, future proofing my purchase with Wifi 7. I am paying for internet speed of 1gbps, with that said, looking at the photo again you can see that I am getting every bit of my money worth and then some. Another thing that I

    E
    Elijah Stephens
    Verified purchaseFebruary 12, 2024
    Blown away!

    Great modem that was very easy to setup. Do be aware that this modem does take a while to cycle when you first power it up. It took about 15 minutes for my to properly setup. I have gig speed internet through Xfinity and needed a modem that would allow me to access my full speeds. With my previous CM1000 I was only getting about 250mbps. With my computer hooked directly to this modem I am seeing speeds 1400mbps which is well above what I actually pay for. Though I wont be running directly off the modem and instead using the Netgear Nighthawk RAXE500 wireless router, the direct connection just

    J
    Jeremiah Blair
    Verified purchaseSeptember 8, 2026
    Fastest to date - throttles above plan cap.

    Holy Cr.... Well I've had multiple CM1200s, tried a surfboard, and one other random brand.Best I've got to date was around 800Mb/s on a 1k Mb line. With the 1200's.This thing throttled at 1131 on it's first test and it's repeating.Spectrum internet in Chattanooga, TN. The senior tech showed me noise in the lines in my area, forcing higher frequency negotiation on the part of the modem. So I rarely get more than 2 years per unit.If this lasts that long - I'll call it money well spent.

    R
    R
    Verified purchaseJanuary 23, 2026
    Works like a charm... Until it bricks 2 months later

    Purchased this during Black Friday 2025 and it stopped working entirely on January 21st, 2026, less than 2 months later (only the bottom 2 lights would display when plugged in, not even the power LED, and absolutely no internet pass-through). Tested internet with a backup modem/router and combo which worked fine, so it was definitely the modem.Jumped on the phone with NETGEAR support after exhausting all usual troubleshooting procedures and, after trying to do a "shock reset" (to no avail), they determined it was a hardware issue and issued a case number. They "graciously" offered to send me a

    S
    Stephen B.
    Verified purchaseJuly 24, 2026
    Sure beats renting from an ISP

    Installed easily, working like it should. This has replaced an old Arris S33, and it has been as good as I had hoped for based on online reviews. Pricey, yes, but will pay for itself in less than 18 months based on my ISP's rental charges for their inferior modem.

    B
    Brian
    Verified purchaseFebruary 22, 2026
    Good cable modem!

    I have 1 gig service but am falling short of that speed by about 200-300 depending on what time of day it is.It may not be this cable modem. It could be Cox service, the router, or cables, but the router is new and is very high end (Asus Rog Strix GE-BS18000)I have a feeling it is the actual cable supplied by Cox because it is going through a splitter.I upgraded, well actually a bit of overkill, with cat 8 cables which improved the speed a slight bit.Overall it is a good cable modem.

    M
    MikeDProducer
    Verified purchaseJuly 2, 2026
    Xfinity - Easy setup, super fast, totally worth it.

    Setting this up on Xfinity was so easy. I plugged it in and scanned the QR code under the modem. The app did the rest. After a few minutes it said it was ready. Make sure you put your phone on cellular data when doing this.My modem speeds are just as fast as the Xfinity rental. I'm paying for 2gig and getting it. The upload is just as fast, as well. It is just as good as the rental. Now I'm not paying for a modem fee any more. That cut 25% off our bill.If you plan on using Xfinity for a long time, buying a modem saves you a lot of money.

    B
    Buckerou
    Verified purchaseJune 16, 2025
    Disappointed

    I own an Arris TG862G modem for many years now. At the time, this was the approved model for VIOP phone lines. At $200 it has paid for itself many times over. Due to retirement living on a fix income, cost cuts were needed so I dropped the Triple Play and now subscribed to internet (Blast - 800Mbps). Recently I keep getting email from Xfinity says my modem (DOCSIS 3.0) is outdated and keeping me from getting my maximum download speeds promised by my plan. After so many of these notices, I decided to take the plunge and get a new DOCSIS 3.1 cable modem. I decided on the Netgear model CM3000-1AZ

    Customer reviews are shown as published on Amazon and are not written by Do Best Deal.